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authorMasami Hiramatsu <mhiramat@kernel.org>2021-09-04 18:54:16 +0300
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-09-08 22:10:41 +0300
commitb66fbbe8d48228e1e81b583ae39abb86d7d09053 (patch)
tree2e02da90c7241f756db435e1fedc7d01ad26a013 /init
parent40caa127f3c7279c75cb0c9684559fa314ee3a66 (diff)
downloadlinux-b66fbbe8d48228e1e81b583ae39abb86d7d09053.tar.xz
init/bootconfig: Reorder init parameter from bootconfig and cmdline
Reorder the init parameters from bootconfig and kernel cmdline so that the kernel cmdline always be the last part of the parameters as below. " -- "[bootconfig init params][cmdline init params] This change will help us to prevent that bootconfig init params overwrite the init params which user gives in the command line. Link: https://lkml.kernel.org/r/163077085675.222577.5665176468023636160.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c23
1 files changed, 14 insertions, 9 deletions
diff --git a/init/main.c b/init/main.c
index d35c4a865adb..d08caed17c7f 100644
--- a/init/main.c
+++ b/init/main.c
@@ -153,10 +153,10 @@ static char *extra_init_args;
#ifdef CONFIG_BOOT_CONFIG
/* Is bootconfig on command line? */
static bool bootconfig_found;
-static bool initargs_found;
+static size_t initargs_offs;
#else
# define bootconfig_found false
-# define initargs_found false
+# define initargs_offs 0
#endif
static char *execute_command;
@@ -422,9 +422,9 @@ static void __init setup_boot_config(void)
if (IS_ERR(err) || !bootconfig_found)
return;
- /* parse_args() stops at '--' and returns an address */
+ /* parse_args() stops at the next param of '--' and returns an address */
if (err)
- initargs_found = true;
+ initargs_offs = err - tmp_cmdline;
if (!data) {
pr_err("'bootconfig' found on command line, but no bootconfig found\n");
@@ -655,16 +655,21 @@ static void __init setup_command_line(char *command_line)
* Append supplemental init boot args to saved_command_line
* so that user can check what command line options passed
* to init.
+ * The order should always be
+ * " -- "[bootconfig init-param][cmdline init-param]
*/
- len = strlen(saved_command_line);
- if (initargs_found) {
- saved_command_line[len++] = ' ';
+ if (initargs_offs) {
+ len = xlen + initargs_offs;
+ strcpy(saved_command_line + len, extra_init_args);
+ len += ilen - 4; /* strlen(extra_init_args) */
+ strcpy(saved_command_line + len,
+ boot_command_line + initargs_offs - 1);
} else {
+ len = strlen(saved_command_line);
strcpy(saved_command_line + len, " -- ");
len += 4;
+ strcpy(saved_command_line + len, extra_init_args);
}
-
- strcpy(saved_command_line + len, extra_init_args);
}
}